Driving mechanism for spindles.



H. ALLEN,

DRIVING MEGEANISM FOR SPINDLES.

APPLICATION LEI) PEBJ, 19GBx Patanted Oct. 20, 1908.

2 SHEETS-'SHEET 2.

UNITED sTATEs HARDING ALLEN, 0E BARRE, MASSACHUSETTS.

PATENT oEEioE.

DRIVING MECHNISM FOR SPINDLES:

Specication of Letters Patent.

Patented Oct. 20, i908.

Application filed February 2, 1906. Serial'No. 299,163.

saoliusettsl` have invented a new and useful kDriving Mechanism. for Spindles, lol" which the following is al specication.

yThe ob1ect ofthis invention is to provide a new. and iinprovedniechanis'm for driving the spindles of various machines, such as the spindlesfof' drilling machines, tapping ma chimes, etc. l y

yThe principal purpose of the invention lis to provide a Inef.1:lianisrn which can adjust collar.'

itself to various kconditions of use and Wear..

To faecoinplishthis result I lit the driving pulley on a' bushing and drive `the spindle by avdriving collar, and provide lost motion connection between the driving pulley and V is illustrated in the accompanying two sheets of drawings referring to which.

Fi-fire. i is abside elevation partly in sec- IThe' invention tion of impioved construction. Fig. 2 is a sectional viewv of par-t of the mechanism shown'in Fig. l, the section being taken'at ri lit-angles to Fig. l. Fig. 3 is a plan view" 0 "the top'of the cone pulley.. Fig. l is a plan view of the. driving collar through which the'power is appliedv Fig. 5 isa side elevation thereof. Fig. 6 is a perspective view'of one of the driving rollers,. and Fig. 7'`

is a perspective view of one ot thefaces with whichfthe rollers engage. y y

vReferring tothe drawings and in detail, A designates the frame or bracket ofthe machine. Secured in this bracket is a bushing 11 which is provided withy 'an oil ordrip cup 10. Fitted in the bushing 1l is the spindle S which it is desiredto drive. L The spindle is provided .with a key-Way ,1;21'

B designates the driving pulley which, in the forin shown, is made with two steps and a llange l) on the under side ol the larger or lower step. The pulley is provided with ball bearings which may be arranged as fol lows: Fitted in the interior .of the driving pulley is a conical bearing piece 13, coperating with which is an oppositely disposed conical bearing piece 130. The inside of the pulley is interiorly screw-threaded below the piece 130 and threaded into Jbis section of the pulley is an adjustable collar 14. `A set of balls l5 is-arranged between the parts 13 and 'L30 to engage a grooved collar 16. The

lower part of the hole in the pulley is bored out larger than the upper part and iittedinto the saine is a conical bearing 17. The lower part ci the pulley is also screethreaded and fitted into the same is an adjustable cone 18 which is adjusted in osition by a screw-- threaded collar 19 which) is arranged' inthe lower portion of the driving pulley. i.

A set of balls 20 is arranged between the conical bearing 17 and adjustable cone 18 and the saine engage agrooved collar 21.

'The grooved collars 16 and 2l are bored out just of the size to fit to the bushingll, Ey this arrangement, there is a ball bearing enf gagernent of the driving pulley with the ushing 11 and the pulley can turn .easily thereon. top of the pulley. This collar is provided. with a key 22 to engage the keyway 12 in the spindle S. The drivingcollar K is provided with holes 23423 loosely fitting in which are headed screws 24e-24 which thus serve to revent axial movement ofthe driving collar.

he driving collar is also provided with depending. pins 25-25 T'itted or. which. are

ardened steel collars 2k3- 26. These collars lit loosely in holes 27-27 cut in to of the driving pulley B. l The drivingV pnl. ey B is slotted adjacent to the holes 27m-2?, as in-` dicated Ain Fig. 48, and fitted in tlie slots are'` `hardened steel bearmgpieces this arrangernenti it Will be seen that `when the driving pulley is revolved, ythebearing pieces 28-28 will pushyon the collars 2li-26 and as the collars arefpractically part of the driving collar K by reason ci the pins 25-25, the collar K will be turned in unison with the driving pulley B and hence power will be im arted to the spindle S. v

t will be noticed that the spindle S is free to move anially through the driving pulley B and driving collar K.

lf the ball bearings, by which. the driving pulley engages the bushing l() become worn, or if the pulley B tends to tip slightly under the heavy tension of the driving pulley, it

A driving` collar Klis arranged` on ico Will be seen that 'lle strain will vnot be iindriving vlpulley B is free to adjust itself properly ant the rotation thereof im arted to the driving collar K in such Way t at there can be no cramping of the spindle S in its bushing 1l. In this Way, an efficient mechanism is provided for the purpose stated.

The details vand arrangements herein shown and described, may be greatly varied by a skilled mechanic Without dcparti-n from the scope of my invention as expressec. in the claims.

Having thus fully described-my invention,

what I claim and desire to secure by Letters- Patent of the United States is 1. In a device for the purpose stated, the combination of a bushing, a driving pulley lrunning thereon, a driving collar, a spindle running throu h the bushing and engaging the driving colIar, and a lost-motion connection between the driving'pulley and driving collar. l

2. In a device for the'purpose stated, the combination of a bushing, a driving pulley running on said bushing, a driving collar on the to of said driving pulley, a spindle tted in sai bushing and said driving collar, said spindle having a key-Way cut therein, a key fitted in said driving collar and engaging a key-Way of a' spindle, and' a lost-motion connection between the driving collar and driving pulley. l

3. In a device for the -purpose stated, the

combination of a bushing, a driving pulley running thereon, a driving collar 'on 'top of thedriving pulley, a syindle iitted in said bushing and in said driving-collar and having a key-Way therein, a key iitted in said driving collar and engaging said key-Way, pins depending'from said driving collar, and rollers mounted on said pins, said driving pulley i having faces engaging said rollers.

4. vIn a device for the purpose stated, the combination of a bushing, a driving pulley running thereon'7 a driving collar on top of the driving pulley, a spindle fitted in said bushing and in said driving collar and having a key-Way therein, a key fitted in said driving collar and engaging said key-Way, ins depending from said driving collar, ro lers eo1,515 v Y mounted on said pins, and bearing pielfes in $0 said driving pulley engaging said rollers.

5. In a device `for the purpose stated, the combination' of a bushing, a driving pulley having a ball-bearing engagement therewith,

a driving'collar on top of the driving pulley, a spindletted in said bushing and in said driving collar and having a key-Way therein, a

key fitted in said driving collar and engaging said key-Way, pins depending from said 'driving collar, rollers on said pins, saiddriving ulley haviniy holes in which said rollers oosely lit, and slots, and bearing ieces fitted in saidslots for engaging said ro lers.

6. In a device for the purpose stated, thev combination of a bushing, a. driving pulley .having a ball-bearing engagement therewith,

a driving'collar on top of the driving pulley having holes therethrough, a spindle iitted in said bushing and in said driving collar and having a key-Way therein, a keyitted in said driving collar' and engaging said key-Wa pins .depending from said driving collar, ro lers mounted o n said pins, said driving pulley having holes in which said rollers loosely fit,

bearing pieces arranged in -said driving p l-.

ley to engage said rollers, and headed screws tapped into said driving ulley and loosely passing through said ho es in the v driving collar.

7. In a. driving mechanism, the combination of a bushing having a plurality of ste s' thereon, a shaft passing through said bus ley, means for loosely connecting said collar and pulley, a grooved 'collar on each of thev HARDING vALI/Eri YVitnesses -LoUIs W. SoUTnGATE,

yMARY E. REGAN.

"ing, a driving collar fixed to said shaft, a pul- 

